Thanks to Jorge's building mods I was able to update the mod to make the color variants swatches on the original floor and merlon pieces. This allows for better mod stability as the game defaults back to the original color without errors if the mod is disabled and allows for better customization by easily swapping between colors without placing new items.

However, due to how wood walls are coded they have remained as one separate object and not color variants under the default wood wall. If I did add them as swatches, any changes to the orientation of the wall (such as swapping from vertical to horizontal) would swap them back to the default wood tone. While not game breaking I chose to keep them as a separate object for now as the dev update this still allows the mod to be safely uninstalled and they will revert back to the base wood color if you do disable the mod.

All standalone objects still exist as a 'hidden' item. You will not be able to place more via copy/paste or see them in the build window. This keeps all your previous builds safe while still allowing me to update to the improved code. Hopefully this is a good alternative. If you would like the old individual items back you can open the basebuildingrepository file in the mod and search for "buildingSubCategoryUI": 108, in the file. Swap all the 108 to 1 and they will be visible again in the build UI.